Sony - In 1993, Sony challenged the industry standard Dolby Digital 5.1 surround sound format with its newer and more advanced proprietary motion picture digital audio format called SDDS (Sony Dynamic Digital Sound). This format employed eight channels (7.1) of audio opposed to just six used in Dolby Digital 5.1 at the time. Unlike Dolby Digital, SDDS utilized a method of backup by having mirrored arrays of bits on both sides of the film which acted as a measure of reliability in case the film was partially damaged. Ultimately, SDDS has been vastly overshadowed by the preferred DTS (Digital Theatre System) and Dolby Digital standards in the motion picture industry. SDDS was solely developed for use in the theatre circuit; Sony never intended to develop a home theatre version of SDDS.

• @sweetie88 (4556)

• Pakistan

Sony - In 1993, Sony challenged the industry standard Dolby Digital 5.1 surround sound format with its newer and more advanced proprietary motion picture digital audio format called SDDS (Sony Dynamic Digital Sound). This format employed eight channels (7.1) of audio opposed to just six used in Dolby Digital 5.1 at the time. Unlike Dolby Digital, SDDS utilized a method of backup by having mirrored arrays of bits on both sides of the film which acted as a measure of reliability in case the film was partially damaged. Ultimately, SDDS has been vastly overshadowed by the preferred DTS (Digital Theatre System) and Dolby Digital standards in the motion picture industry. SDDS was solely developed for use in the theatre circuit; Sony never intended to develop a home theatre version of SDDS.